'I don't give a f***, n*****, open the door': Police 'Tasered black ex-Marine to death' after he accidentally triggered medical alert in his sleep.Kenneth Chamberlain Sr, 68, allegedly shot by stun and beanbag guns
Officers claimed 'self-defence' as he was 'deranged' and 'waving hatchet'
But new evidence shows he was unarmed and racially taunted by police
Grand Jury convened over 'alleged inconsistencies' over police reports